Function toDate

docs/app/js/sanddance-app.js:107110–107113

(_, parser)

}
const defaultParser = (_)=>isNumber(_) ? _ : isDate(_) ? _ : Date.parse(_);
function toDate(_, parser) {
    parser = parser || defaultParser;
    return _ == null || _ === "" ? null : parser(_);
}
function toString(_) {
    return _ == null || _ === "" ? null : _ + "";
}